Dispensing device for calking and like material



2 Sheets-Sheet l INVENTORI W. A. SHERBONDY DISPENSING DEVICE FOR CALKINGAND LIKE MATERIAL i J L May 9 Filed Jan. 25., 1954 ATTOR/VE K5- M y mwDISPENSING DEVICE FOR CALKING AND LIKE MATERIAL Filed Jan. 25, 1954 W.A. SHERBON IDY 2 Sheets-Sheet 2 INVENTOR. MLL/AM A. SHERBaA/DV UnitedStates Patent DISPENSING DEVICE FOR CALKING AND LIKE MATERIAL A largefield of use has been developed for dispensing devices or apparatus ofthe type known commercially as calking guns, whereby a suitable plasticmaterial is injected into voids and cracks in the walls of buildings andlike structures in order to seal the same. While guns have been designedin which the material inquestion can be directly charged, in order topreserve such material in proper state for use it has become customaryto place the same in a sealed cartridge that in elfect becomes a part ofthe gun when employed therewith. Such cartridge usually takes the formof a cardboard tube, the walls of which are suitably treated or providedwith an impervious layer to prevent the plastic contents of the tubefrom penetrating such walls. In addition to such treatment or provision,if, as is ordinarily the case, the tube when assembled with the gunrequires to be self-sustaining, the

walls thereof have to be of substantial thickness in order to have therequired degree of rigidity. In addition there remains the problem ofsealing the respective ends of the tube.

One principal object of the present invention is to provide a dispensingdevice or apparatus of the character described, in which the containerfor the material to be dispensed is in the form of a thin walledcollapsible bag. The wall of such bag will be made of a tough imperviousmaterial such as Pliofilm, so that when filled with calking or likecompound the resulting soft package may be handled without danger ofrupture.

A further object is to provide such soft package cartridge with asuitable spout through which the contents may be discharged when thecartridge is placed in the gun, such spout normally forming a seal forthe corresponding end of the cartridge or package and at the same timebeing adapted to provide a discharge opening of varying shape and sizeto suit the need of the user.

To facilitate the use of such novel cartridge or package furtherimprovements have also been made in the gun wherewith it is designed tobe used.

To the accomplishment of the foregoing and related ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the claims.

The annexed drawing and the following description set forth indetailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used. p i

In said annexed drawing; 1

Fig. 1 is a side elevation of a calking gun embodying the aforesaidimproved construction, such gun being shown in conjunction with acartridge which likewise embodies the above-mentioned improvements;

Fig. 2 is similarly a side elevation of one principal part of. the gunwhich cooperates with the present improved Fig. 5 is a view similar toFig. 1, but partly in section and showing certain modification inconstruction.

So far as concerns the main operative elements of the calking gun 1,these may be of any suitable construction; for example that shown inPatent No. 2,602,571 issued to me under date of July 8, 1952. For thepresent purpose the only parts of such gun that need be noted are theplunger 2 and the piston 3, that is carried by the inner end of suchplunger. Detachably secured to, so as to project from, the gun inalignment with the plunger 2, and thus with the direction of movement ofthe piston 3, is a shell 4 of general cylindrical form. Such shell maybe made of light gauge sheet metal, or molded of plastic -or othermaterial so long as it is suinciently strong and rigid to serve theindicated purpose. The inner end of said shell, i. e., the right handend as viewed in Fig. l, is designed to be received in a cup-shaped seat5, that is firmly attached to the gun proper. The opposite end of theshell is necked inwardly to provide a tubular extension 7, the functionof which will be presently described. One portion 6 of the side wall ofsuch seat preferably projects a substantial distance beyond this seatproper, so as to provide a lateral support for the shell 4', when inplace. In order to retain the shell securely seated, a bail 8 isprovided, the respective arms of such bail being pivotally attached toseat 5 about a transverse axis 9. The outer portion of bail S is formedto provide a transversely disposed loop ltl the sides of which areadapted to engage with slot-like depressions 11 on opposite sides oftubular extension 7 of the shell 4. When, as shown in Fig. 1, the loopby thus engagaing the extension will lock the parts securely together;however, by swinging the bail outwardly, the parts are left free to bedisassembled. It will also be understood that other forms of bail thanthe one herein illustrated and described may be employed; for examplethe forms shown in the previously mentioned Patent No. 2,602,571 orcompanion Patent No. 2,602,570. The piston 3 is designed to fit closelybut slidably within shell 4 when the parts are assembled. As in the caseof the bail, so too the particular means provided in the gun I forreciprocating the plunger or piston :rod 2 is a matter of indifference,one suitable construction being found in my previously cited Patent No.2,602,571. It will also be noted that the piston 3 is dished slightlyinwardly so as to conform generally with the outer end of shell 4, orrather with the corresponding end of the cartridge or container for thematerial to be dispensed, as will now be described.

As previously explained, for use in conjunction with and as an essentialpart of the apparatus thus far described, a special cartridge isprovided. This comprises essentially a bag-like container 15 which ispre-filled with the plastic material to be dispensed. The body 15 ofsuch container is formed of a thin sheet of material impervious to thecalking compound or other product that is implied to such particularmaterial, so long as it has the stated characteristics.

In its fully expanded condition, i. e. when filled with the materialwhich is to be dispensed, the body 15 of said container will, asillustrated in Figs. 3 and 4, assume the form of a cylinder having anexternal diameter approximately the same as the internal diameter ofshell 4-. The length of such body will likewise correspond closely withthe length of said shell, or rather that of the cylindrical portionthereof. Fitted to one end of such body is a tapered spout or nozzle 16,preferably molded of plastic material, although it may be made of lightgauge Patented May 6, 1958 3 metal if desired. The end of the body 15 isdesigned to fit snugly within a collar 17 on the large end of suchnozzle and is firmly attached thereto by a suitable adhesive or byfusion where the character of the materials is such as to-permitthismode of attachment.

In its initial form, as thus attached to the cartridge formed by thewall15 and its contents, the outer end of spout 16 is closed; in otherwords, the nozzle normally forms a seal for the corresponding end of thecontainer. Accordingly, before the material within the latter can bedispensed such nozzle requires to be transversely severed, and byselecting the point therealong at which it is thus severed and byvarying the angle of the cut, the shape and size of the dischargeopening may be varied to suit the particularuse to which the device orapparatus is to be put. The lines a, b, c and d on Fig. l constitutemarkings that indicate the manner in which the nozzle may be thussevered in order to adapt the nozzle for.

difierent uses.

After the body of the container has been filled in the manner abovedescribed, the end thereof opposite the spout or nozzle 16 willdesirably also be sealed as by folding inwardly an extension of the sidewall in the form of angular flaps 18, in the same manner as the bottomof a paper bag is ordinarily closed, and then adhering such flapstogether. Any other method of tightly closing the end of a bag may ofcourse be employed. The container as thus filled and sealed may bereadily packaged for storage and transport, with assurance that thecontents will be preserved indefinitely in condition for intended use.After the contents have been dispensed, the container, including theattached spout, may be discharged. Since such spout may be attachedincidentally to the filling of the container, the

latter may, until this stage of assembly is reached, be

handled in flat form, as indicated by the dotted lines 150 on Fig. 4,and be of indefinite length, successive sections of the length requiredfor the container being then cut therefrom.

The operation of the device or apparatus as a whole will now bedescribed. Assuming that the shell 4 has been detached from the gun 1 byreleasing the bail 8 from engagement with such shell, a charged orloaded cartridge 15, sealed at its outer end by the attached spout ornozzle 16, is slipped into the shell until the collar 17 abuts theshouldered end 11 of the shell. In this position of parts the spout willextend beyond such end a suflicient distance to permit it to be severedat selected points in the manner previously set forth. The bail 8 is nowbrought in position to lock the shell in place.

Thereupon by actuating the gun in familiar fashion, the piston 13, whichof course is in fully withdrawn position, may be advanced at such rateand to such extent as may be desired for the particular operation inhand.

As the piston is thus advanced, the flexible side wall which constitutesthe body 15 of the container will be collapsed under the pressure thusimposed, and its contents force out through the spout.

The described apparatus is also adapted for use without necessarilyemploying the collapsible container dependently in the outer end of theshell 7 so as to seal such end and the material to be dispensed is thenfilled directly into such shell which now becomes the container. For thepurpose of sealing the inner end of the latter, a circular disk 20 isinserted within such end in tight fitting but slidable relation. Suchdisk in cross-section will, as shown, desirably conform with the dishedshape of the piston 3. Accordingly when the shell, now constituting thecontainer for the material to be dispensed, is secured in place on thegun by means of the bail 8, the piston being fuily withdrawn, will uponactuation of the gun advance the disk 20 and discharge the material inthe container through the spout or nozzle which of course will have beensevered, as above described, to provide an outlet opening of selectedsize.

While in the case of such modified construction by removing the spout ornozzle and the disk 20 after the container has been emptied suchcontainer may be reused, it is contemplated it will ordinarily be madeof plastic or other inexpensive material and so may be discarded just asin the case of the previously described collapsible container.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any of the followingclaims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a dispensing apparatus of the character described, the combinationof a piston-actuating gun, a rigid, substantially cylindrical shell openat one end and constricted at the other end to provide a shoulderterminating in a neck, said shell being attached at such one end to saidgun to receive such piston for reciprocatory movement therein, and acollapsible container of which the side wall is of flexible filmmaterial adapted to fit within said shell with one end adjacent to suchpiston and with the other end positioned against such shoulder, suchother end of said container being of relatively rigid material andprovided with a dispensing spout which projects through andsubstantially beyond such neck and through which spout material in saidcontainer may be discharged by longitudinally collapsing the side wallof the latter between such shoulder and piston.

2. As an article of manufacture, a container for material to bedispensed from an apparatus of the character described, said containerbeing of general cylindrical form having a side wall of flexible filmmaterial and having closed ends, one of which is of relatively rigidmaterial and terminates in a spout of smaller diameter than saidcontainer, said flexible side wall being longitudinally collapsible byrelative movement of said ends toward each other, the closed tip of saidspout being adapted to be severed for discharge of the material fromwithin said container.

References Cited in the file of this patent UNITED STATES PATENTS1,387,356 Cook Aug. 9, 1921 1,944,201 Wharton Jan. 23, 1934 2,009,761Calderara July 30, 1935 2,050,812 Schweitzer Aug. 11, 1936 2,618,414Matlas Nov. 18, 1952 2,652,955 Crewe Sept. 22,1953

